Meridian America Link/Customer Controlled Routing Using an A/B switchbox to share system consoles

276Chapter 11: Peripheral device cabling interface

Using an A/B switchbox to share system consoles

You can use a single terminal as a system console for more than one application if you use an A/B switchbox. Follow the installation procedure below to install the NT3M50AD (A0345353) and similar A/B switchboxes.

Note: Using an A/B switchbox to switch a console from one module (either an IPE Module or an Application Module) to another may cause system error messages to be lost. If the console is switched to one module, any system error messages sent to the console from the other module will be lost. For example, if Module A were to report SCSI failure as a system console message while the A/B switch was set to Module B, Module AÕs messages would be lost.

Connecting the A/B switchbox

1Place the A/B switchbox in a suitable location near the IPE Module or Application Module.

2For the IPE Module: Plug one end of an NT1R03DB cable into the port 1 connector of the NT1R03AA cable.

For the Application Module: Plug one end of the 9-pin-to-25-pin cable (or extra NT7D61 cable) into the Application Module (J7 on the I/O subpanel, SYS CONS on the universal I/O panel or card 1 conn 1 of the generic I/O panel) for your application.

3Plug the other end of the cable into the connector marked ÒAÓ on the rear of the A/B switchbox and secure it.

4Repeat steps 2 and 3 for the second application, using the ÒBÓ connector on the A/B switchbox.

5Label the front of the A/B switchbox to indicate which application is connected to each port.

6Install a straight RS-232 cable between the ÒCÓ connector on the rear of the A/B switchbox and the terminal.

553-3202-210 Standard October 1998